Improvement in the construction of cane-seat chairs



iaited tate CHARLES M. RO-IFIILIOF PORTLAND, OREGON. l

Letters Patent No. 104,207, dated June 14, 18'70.

IMPROVEMENT lIN' THE CONSTRUCTION 01"' CANE-SEAT CHAIRS.

The Schedule referred to in these Letters Patent and making part of thesame.

I, CHARLES M. Rona, of Portland, in the county of Multnomah, in theState of Oregon, have invented an Improved Gane-bottom Chair. of whichthe following is a specification.

Object of the I Mention.

Vmanner of preventing the breakage of the cane over the inside edgeofthe frame. A

The inventor knows that some chairs are beveled or chamfered ou thevupper inside corners, but the peculiar shape he makes them is not knownor used. Such beveled chairs do not prevent the'breakage they l aredesigned to in any considerable degree, fcr it is found that they breakon the edges of the chamfers almost as readily as on the plain corners,as the cane bends on one point constantly'. By the method theinveutoruses, a new point is brought to bear as the weight is shifted.

Every chair after alittle use is soon baggy and admits of the peculiarcurve of the inventor, which he gives 'to the upper inside bearing ofthe chair-frame. 1f ,the bag is close to one edge by reason of theweight being concentrated at that point, then the rounder' part of thecurve (lower) takes the weight, while, ou the opposite side, the Hatterpart bears the weight, and so, no mattei' how the weight may be shifted,the roundest part of the frame is next -the lweight. If' the weight benext the middle, then it lis distributed about the frame equally.

. -In relation to the holes in which the caneis inserted, the inventoruses the following plan for making the frame free from any liability tosplit through the line of holes: y

He bores in in such a way that they form a zigzag on the bottom and aline on the top, looking as other chairs. This is donc in the followingway:

The bit in the boring-machine inclines from the horizon about sixtydegrees and the half of the holes are bored with the point of the bitpointing inwardly and half of them with the bit pointing outwardly; theythen have the appearance shown in the section, on a line on the upper'part of the chair and zigzag on the under side. This arrangement of theholes is for this purpose.- When the cane is woven in the usual patternit will go across the grain of the wood, .and, as it were, tie the woodtogether; even though the wood were split, the weight of the sitterwould bindl the split together instead of tending to split it more.

The usual way of boring these holes in a uniform manner in straightlines or curves vertically through the wood is a source of considerablemischief in the way of this splitting, and this, with the breakage ofthe cane, soon renders these very pleasant chairs nnlit for use.

unserutiuizing eye similar to other chairs.

l Drawing. Figure 1 is a perspective viewofa chair-bottoni; A the frontand B the back. l

Figure 2 is a section from'A to B, showing the angularly-pierced holes CD and C E; also shows the curve ci' the upper inside edges of thechair-frame, which is a attened double elliptic, the lower elliptichaving the smaller radius; also, the curve C S.

Figure 3 shows the bottom or under side of the chair-frame or bottom andthe zigzag appearance of the holes G D and C E. l v

Claim. A

That I'clairn as my improvement iu the construction ot chairs is Thedouble elliptic curve O S and the angularlypierced holes C D and C E,arranged as hereln dcscribed for the purpose specied. CHARLES MQROHR.

Witnesses LIN ANDERSON, WM. A. DOBY.

The inventors chair wears well, and, in great measure, overcomes thesediiculties, appearing to'an

